Q&A - PSLE Science

[Robertpattinsonidle]

charsen:

Robertpattinsonidle:

[quote=\"Rhhn\"]Please remember that it is not poor conductor of electricity but is electrical insulator. Only poor conductor of heat no electricity

So many confusions. Charsen said something else. My teacher said something else. Google says something else! AGHH!!

Hi
Sorry for the inconveince caused.I was wrong.
Note:
Non-conductor/insulator of electricity.
Poor conductor of heat.
Cheers[/quote]No problem. As long as everyone learnt something tricky et meaningful today.

[ms_lim]

http://i49.tinypic.com/2nsxslf.jpg\">


Ans key is 1 can help to explain? I thought ans is 4?

[ms_lim]

These are the options for previous post


http://i48.tinypic.com/244qses.jpg\">

[notfreemom]

ms_lim:

These are the options for previous post


http://i48.tinypic.com/244qses.jpg\">

My answer also 4. If it is GPE, then answer is diff.

[charsen]

ms_lim:

These are the options for previous post


http://i48.tinypic.com/244qses.jpg\">

Hi
The answer is definetly option 4 as gravitational force is constant on the ball even if the ball is in the air.

Cheeers

[ms_lim]

charsen:

ms_lim:

These are the options for previous post


http://i48.tinypic.com/244qses.jpg\">

Hi
The answer is definetly option 4 as gravitational force is constant on the ball even if the ball is in the air.

Cheeers

Thanks for the confirmation, charsen.

[Robertpattinsonidle]

ms_lim:

charsen:

[quote=\"ms_lim\"]These are the options for previous post


http://i48.tinypic.com/244qses.jpg\">

Hi
The answer is definetly option 4 as gravitational force is constant on the ball even if the ball is in the air.

Cheeers

Thanks for the confirmation, charsen.[/quote]I disagree. Gravitational force is the same as gravity and gravity does not always be the same. My answer is number 1. When the ball is higher, there will be more gravity acting on it so the graph should be 1. GPE is whereas, the stored energy which follows the gravity right? So i support 1.

[Michaelia0816]

I support 4.

[Michaelia0816]

Need help,


1) Which of one of the following has an adaptation that may reduce its speed when moving in water?
(1) Whale
(2) Penguin
(3) Pufferfish
(4) Seal

[charsen]

Michaelia0816:

Need help,


1) Which of one of the following has an adaptation that may reduce its speed when moving in water?
(1) Whale
(2) Penguin
(3) Pufferfish
(4) Seal

Hi
The answer is pufferfish. It will pop out its spines making the pufferfish look inflated.Since it is inflated,it does not have a streamlined shape body before inflating
Thus,this adaption of inflating reduces the moving speed of the pufferfish.
Cheers.